WK202070B1003GD500 - Vishay Presicion Group

www.vishay.com For technical questions, contact: filmresistorsleaded@vishay.com Document Number: 20128

176 Revision: 26-May-10

WK/WR

Vishay Draloric

High Power Metal Oxide Leaded Resistors

FEATURES

•Rugged metal oxide film

•High power dissipation in small size (1 W/0207

size to 4 W/0922 size)

•High temperature coating (up to 200 °C),

non-flammable

•Lead (Pb)-free solder contacts

•Pure tin plating provides compatibility with lead (Pb)-free

and lead containing soldering processes

•Compliant to RoHS directive 2002/95/EC

Notes

• Coating: Green

• Marking: WK2 and WR4 have color code band marking. TCR band will be given to only WK2, 100 ppm, 5 %. WR5 and WK8 are printed marked.

Notes

(1) Rated Voltage

(2) For values < 10R the upper limiting temperature is 155 °C. The power rating is correspondingly lower and can be calculated by Rth.

STANDARD ELECTRICAL SPECIFICATIONS

MODEL SIZE

RATED DISSIPATION

P70

LIMITING ELEMENT

VOLTAGE Umax.

V≅

TEMPERATURE

COEFFICIENT

ppm/K

TOLERANCE

RESISTANCE

RANGE E-SERIES

WK2 0207 1.0 500 ± 50 ± 1 4.7 Ω to 1 MΩE24, E96

WK2 0207 1.0 500 ± 100 ± 2

± 5

4.7 Ω to 1 MΩ

E24, E48

E24

WK2 0207 1.0 500 ± 200 ± 5 0.22 Ω to 1 MΩE24

WR4 0414 2.0 500 ± 200 ± 2

± 5

1 Ω to 1 MΩ

0.33 Ω to 1 MΩ

E24, E48

E24

WR5 0617 3.0 750 ± 200 ± 2

± 5

1 Ω to 100 kΩ

0.22 Ω to 560 kΩ

E24, E48

E24

WK8 0922 4.0 750 ± 200 ± 2

± 5

1 Ω to 68 kΩ

0.22 Ω to 100 kΩ

E24, E48

E24

TECHNICAL SPECIFICATIONS

PARAMETER UNIT WK2 WR4 WR5 WK8

Rated Dissipation, P70 W 1.0 2.0 3.0 4.0

Limiting Element Voltage, Umax.(1) V≅500 500 750 750

Insulation Voltage, Uins (1 Min) V > 500 > 500 > 500 > 500

Thermal Resistance, Rth K/W ≤ 140 ≤ 100 ≤ 70 ≤ 60

Insulation Resistance Ω> 109

Category Temperature Range (2) °C - 55 to + 200

Failure Rate 10-8/h < 1

Weight g 0.2 0.7 1.5 3.5

P x R

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177 Revision: 26-May-10

WK/WR

High Power Metal Oxide Leaded Resistors Vishay Draloric

Notes

(1) Please refer to table PACKAGING

• The PART NUMBER shown above is to facilitate the unified part numbering system for ordering products

PART NUMBER AND PRODUCT DESCRIPTION WK2-SERIES

PART NUMBER: WK202070C1001FD500

MODEL/SIZE VARIANT TCR VALUE TOLERANCE PACKAGING (1) SPECIAL

WK20207 0 = Neutral C = ± 50 ppm/K

B = ± 100 ppm/K

A = ± 200 ppm/K

3 digit value

1 digit multiplier

MULTIPLIER

F = ± 1 %

G = ± 2 %

J = ± 5 %

22 = A2

25 = A5

D5 = R5

Up to 2 digits

00 = Standard

7 = *10-3

8 = *10-2

9 = *10-1

0 = *100

1 = *101

2 = *102

3 = *103

4 = *104

5 = *105

6 = *106

PRODUCT DESCRIPTION: WK2 50 1K0 1 % R5

WK2 50 1K0 1 % R5

MODEL TCR RESISTANCE VALUE TOLERANCE PACKAGING (1)

WK2 ± 50 ppm/K

± 100 ppm/K

± 200 ppm/K

49K9 = 49.9 kΩ

50R1 = 50.1 Ω

1K0 = 1.0 kΩ

± 1 %

± 2 %

± 5 %

PART NUMBER AND PRODUCT DESCRIPTION WK8-SERIES

PART NUMBER: WK80922001000J5C00

MODEL/SIZE VARIANT TCR VALUE TOLERANCE PACKAGING (1) SPECIAL

WK80922 0 = Neutral 0 = Standard 3 digit value

1 digit multiplier

MULTIPLIER

G = ± 2 %

J = ± 5 %

5C = AC

G1 = R1

Up to 2 digits

00 = Standard

7 = *10-3

8 = *10-2

9 = *10-1

0 = *100

1 = *101

2 = *102

3 = *103

4 = *104

5 = *105

PRODUCT DESCRIPTION: WK8 100R 5 % AC

WK8 100R 5 % AC

MODEL TCR TOLERANCE PACKAGING (1)

WK8 100R = 100 Ω

47K = 47 kΩ

± 2 %

± 5 %

PART NUMBER AND PRODUCT DESCRIPTION WR-SERIES

PART NUMBER: WR404140A1001GFE00

MODEL/SIZE VARIANT TCR VALUE TOLERANCE PACKAGING (1) SPECIAL

WR40414

WR50617

0 = Neutral A = ± 200 ppm/K 3 digit value

1 digit multiplier

MULTIPLIER

G = ± 2 %

J = ± 5 %

41 = A1 G73

51 = A1 G77

FE = RE G73

GP = RP

Up to 2 digits

00 = Standard

7 = *10-3

8 = *10-2

9 = *10-1

0 = *100

1 = *101

2 = *102

3 = *103

4 = *104

5 = *105

6 = *106

PRODUCT DESCRIPTION: WR4 1K0 2 % RE

WR4 1K0 2 % RE

MODEL RESISTANCE VALUE TOLERANCE PACKAGING (1)

WR4

WR5

1K0 = 1.0 kΩ

51R0 = 51.0 Ω

± 2 %

± 5 %

A1 (G73)

A1 (G77)

RE (G73)

02 10 1FD0K2 50W700 0C

09 10 0J50K8 C0W202 00

04 10 1GF0R4 E0W401 0A

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178 Revision: 26-May-10

WK/WR

Vishay Draloric High Power Metal Oxide Leaded Resistors

DIMENSIONS

Notes

(1) 9 mm for WR5/WK8

• Taping in acc. with IEC 60286-1

• D and L measured in acc. with IEC 60294

• d according to IEC 60301

PACKAGING

MODEL

REEL BOX

PIECES/REEL CODE MIN. ORDER QTY

PACKAGING UNITS PIECES/BOX CODE MIN. ORDER QTY

PACKAGING UNITS

WK2 5000 R5 1 5000

2000

WR4 2500 RE 2 1000 A1 (G73) 2

WR5 1500 RP 2 1000 A1 (G77) 2

WK8 1000 R1 2 500 AC 2

6 mm (1)

MODEL

DIMENSIONS [in millimeters]

DLL

1 max. Bde

WK2 2.5 - 0.5 6.5 - 0.5 8.0 53 ± 1 0.6 7.5

WR4 3.9 - 0.5 10.0 - 1.6 12.0 73 ± 1 0.8 15.0

WR5 6.0 - 0.5 16.5 - 1.5 20.0 77 ± 1 0.8 17.5

WK8 9.0 - 0.5 20.0 - 1.5 24.0 77 ± 1 0.8 22.5

120

100

- 55 0 40 80 120 160 200 240 280 320 360

70 AMBIENT TEMPERATURE IN °C

DERATING

REWOP

300

250

200

150

100

0 1.0 2.0 3.0 4.0 5.0

POWER IN W

TEMPERATURE RISE

I ESIR

WR4

WK2

WR5

WK8

WR 5

WR 4

WK 8

WK 2

WR 5

WR 4

WK 8

WK 2

10-5 10-4

100

10-1 10010

101

10-1

10-2 100

10-3

102

10-1

10-5 10-4 10-3 10-2

103

]W[

GNITAR REWOP

]

R REWOP

PULSE RATING O

Secondary Conditions:

a) ϑ

b)ϑu≤ 70 °C

c) Ûmax. see diagram below

d) ~ 10R

Secondary Conditions:

a) ≤ 70 (permissible constant

power at ϑu = 70 °C)

b)ϑu≤ 70 °C

c) Ûmax. see diagram below

d) ~ 10R

SQUARE PULSE i [s]

PULSE RATING ≤ 70

WK2

WR4

WR5

WK8

100

101

102

10-1

103

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179 Revision: 26-May-10

WK/WR

High Power Metal Oxide Leaded Resistors Vishay Draloric

Note

(1) Limits for change of resistance at test

NON-LINEARITY

]Bd[ 3A YTIRAENIL-NON

130

120

110

100

1K 10K 100K 1M 10M

RESISTANCE VALUE IN

WR4

WR5/WK8

CURRENT NOISE

0.1

0.01

ESION TNE

CµV/V

WR4

10K 100K 1M 10M

RESISTANCE VALUE IN

2000

1000

WR 5/WK8

WR 4

MAX. PULSE VOLTAGE

WK 2

10-5 10-4 10-2

10-3 10-1 10

100

WR5/WK8

Secondary Conditions:

a) max. see diagram below

b) See diagram below

ϑu ≤ 70 °C

max.

[V]

EGATL

–

SQUARE PULSE i [s]

PERFORMANCE

TEST CONDITIONS OF TEST REQUIREMENTS

(ΔR MAX.) (1)

Rated Dissipation, P70

IEC 60115-1, 4.25.1 1000 h at 70 °C 1.5 h ON, 0.5 h OFF

WK2 ≤ ± (5 % R + 0.1 Ω)

WK8 ≤ ± (2 % R + 0.1 Ω)

WR4, WR5 ≤ ± (5 % R + 0.1 Ω)

Endurance at UCT

IEC 60115-1, 4.25.3 1000 h at 200 °C without load WK2, WR4 ≤ ± (5 % R + 0.1 Ω)

WR5, WK8 ≤ ± (1 % R + 0.1 Ω)

Overload Test

IEC 60115-1, 4.13

Short time overload 5 s at 2.5 x rated voltage or ≤ ± twice the limiting

element voltage ≤ ± (0.25 % R + 0.05 Ω)

Thermal Shock

IEC 60115-1, 4.19 Rapid change between upper and lower category temperature ≤ ± (0.25 % R + 0.05 Ω)

Climatic Sequence

IEC 60115-1, 4.23 Dry heat, damp heat cycle, cold, low air pressure ≤ ± (0.5 % R + 0.1 Ω)

Damp Heat Steady State

IEC 60115-1, 4.24 56 days; 40 °C; 90 % to 95 % RH; loaded with 0.01 P70 ≤ ± (1.5 % R + 0.1 Ω)

Resistance to Soldering Heat

IEC 60115-1, 4.18 10 s at 260 °C solder bath temperature ≤ ± (0.25 % R + 0.05 Ω)

Robustness of Terminations

IEC 60115-1, 4.16 Tensile, bending and torsion ≤ ± (0.25 % R + 0.05 Ω)

Vibration

IEC 60115-1, 4.22

Frequency 10 Hz to 500 Hz; displacement 1.5 mm or

acceleration 10 g; three directions; 6 h ≤ ± (0.25 % R + 0.05 Ω)

APPLICABLE SPECIFICATIONS

• EN140100, EN60115-1, IEC 60115-1

Document Number: 91000 www.vishay.com

Revision: 18-Jul-08 1

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